Numerical Radius Inequalities for Products of Hilbert Space Operators II

被引：1
|
作者：
Abu-Omar, Amer [1 ]
机构：
[1] Fahad Bin Sultan Univ, Coll Sci & Humanities, Tabuk, Saudi Arabia
来源：
NUMERICAL FUNCTIONAL ANALYSIS AND OPTIMIZATION | 2020年 / 41卷 / 02期
关键词：
Accretive; cramped; dissipative; numerical radius; numerical range;
D O I：
10.1080/01630563.2019.1590400
中图分类号：
O29 [应用数学];
学科分类号：
070104 ;
摘要：
New estimates for the numerical radius of the product AX are given. These estimates refine the known estimate w(AX) <= 2 parallel to A parallel to w(X) when 0 is not an element of W(A) or 0 is not an element of W(X).
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页码：127 / 133
页数：7
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